期刊
ANNALS OF PHYSICS
卷 400, 期 -, 页码 198-207出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.aop.2018.11.004
关键词
Wormholes; Einstein-Maxwell-dilaton theory; Shadow
资金
- University of KwaZulu-Natal, South Africa
- National Research Foundation, South Africa
- South African Research Chair Initiative of the Department of Science and Technology
The study of shadow is quite prominent nowadays because of the ongoing Event Horizon Telescope(1) observations. We construct the shadow images of charged wormholes in Einstein-Maxwell-dilaton (EMD) theory. The spacetime metric of the charged wormholes contains three charges: magnetic charge P, electric charge Q, and dilaton charge Sigma. We evaluate the photon geodesics around the charged wormholes. We also calculate the effective potential and discuss its behavior with angular momentum L and different values of charges P, Q, and Sigma. A study of the shadow of charged wormholes reveals that the shadow has an effect of the charges P and Q. The radius of the shadow increases with the magnetic charge P as well as the electric charge Q. We also find that the dilaton charge does not affect the shadow of the charged wormholes. (C) 2018 Elsevier Inc. All rights reserved.
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